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I know there's a holset whore on here, I seen some of the post but don't remember who it was.

 

Iv only found a little info on these on gas engines and full spec sheets for diesel. Does anyone have first hand experience with different sizes? (Spool time, max hp per size and durability from the year ranges)

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He351 or he341, then I would say hx35 and last h1c. That's assuming you're talking about 1jz and give a shit about spool. The hx40 works well on na-t 2jz and hx52 on half bridge 13b from personal experience. What are you building and what are you using it for?

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It's going on a 2jna-t. 560s, ffim. Trying to hit 500 to start untill he gets a good management then 650

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15psi by 3800 made 400rwhp on 550cc inj before the ffim, wasa great turbo.

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I really don't like putting Holset's on these engines unless you are just doing a scum bag build. Turbo Technology has come quite far lately and has gotten much cheaper.

 

 

HX35 is too small for 2jz's, at the limit on 1JZ.

 

HX40 is a good fit for 3.0L but the lb/min ratings kind of suck (on Holsets in general).

 

Anything bigger= good luck fitting it anywhere.

 

Just because it's for a motor nearly twice the displacement as ours does not mean it will make tons of power or be laggy, quite the opposite. Diesel exhaust is considerably colder than Gas exhaust, and the 5.9L's power band ends at 3500 RPM completely, sweet spot is 2500. That means the turbo was designed for an engine that generates less heat than ours and has a peak power band of 2500@5.9L, which equates to 5000rpm at 3.0L... which is usually at the beginning of our power band.

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Doesnt have a whole lot to do with gas vs diesel nor even displacement. Has everything to do with VE. So unless anyone has any VE maps for our motors..... Im also really confused at your "powerband" comparison. Where are you getting your data? At peak 5.9s flow roughly 600cfm. I believe 2jzs are roughly 300cfm.

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That explains why everybody that does a holset build doesnt make any power, thanks for the insight.

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It has everything to do with heat, and JZ's generate more heat quicker than the Cummins motors. It has everything to do with Diesel compared to Gas because it has everything to do with HEAT. Heat is the sole component that moves the turbine so more heat equals more spool, and if JZ's generate more heat than the 5.9L then you will have the issue I brought up that the turbine and housing are too small. If the turbine housing is too small, the JZ will over-spool the turbo and the turbo will begin to surge which heats up the air coming out of the compressor, damages the turbo, and throws VE out the door since hotter air has less oxygen in it. Less oxygen means less combustion meaning less "horsepower". And considering "Horsepower" is only a measurement of WORK completed over a given TIME, that shows why the cummins has less Horsepower than our engines. Sure, the motor is bigger, but it's TIME is limited, meaning RPM. A 3.0L motor can do the same amount of work as a 6.0L if the TIME is doubled, but guess what, that 3.0L can almost triple it's TIME compared to the 6.0L (cummins, not all 6.0L) meaning in the simplest terms... it can get more shit done faster than the big guy.

 

Also, the A/R info on Holset's are not what people think they are. Holset never released their info (if you find it from THEM specifically, please let me know) and the closest thing we can use to determine it is how Mitsubishi sizes their housings, but there has been inconsistencies even with those comparisons.

 

VE, heat, blah blah blah also does not change the fact that these turbos are old tech, and I have never seen anyone making 600+ with a holset on a JZ, at least without intake temps above 170*. Just go buy a journal bearing Borg S300 and make 450 at 15psi on pump gas.

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borg warners are stupid fucking cheap brand new on ebay so I don't see why you would run a holset anymore honestly, especially if you need to swap turbine housings

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im running an he341 on 3 liters and it sort of sucks. it hits wicked hard, at around 35-3800 rpm. pulls hard to redline, but that lag and the all at once boost sort of isn't doing it for me. im on stock electronics and the only code i have is for speed sensor. im in boost by like 2500rpm, but its only like 7 psi. until 3500 when it shoots to 14 psi. im sure its making great power, mid 300's at least, but the delivery isn't doing it for me.

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Same thing I had when running an HX35. I actually went faster when my giant knock-off gate opened. Hearing turbine noise at idle was cool, but then it tipped me off that something might be a little constipated.

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I dont follow your logic, if it was spooling fast, and dying off up top, sure, but it isnt. Its just acting like a gigantic turbo. And its not that either.

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Austin, what boost controller are you running? Going from 7-14psi like that sounds like a bad wastegate or odd boost setting

 

 

 

Do you know what rpm your ecu goes in to open loop?

Sorry, just wondering, boost jump sounds odd

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No boost controller . Straight wastegate. Tial wastegate, and it isnt cracking until 14psi.

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I still stand by them making easy 600horse on these motors. Seeing as they make a shit load on 2.0s. I just dont feel like fucking with the manifold anymore. 600$ OBO

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Have you ever seen anyone make anywhere near 600 with an HX35 on a 2JZ? No. Most people make mid 300s to 400. The most I've seen is this guy making 475.

 

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